remove the filter at the bottom right corner.please note all the water will come out!.once the water has all come out shine a torch into the filter housing and you will see the drain pump impellor right at the back.usually something has jammed in the impellor and can be removed with a pair of long nosed pliers.use a long screwdriver to rotate the impellor.it should move around without to much effort if it is ok.
ck
January 2009